...The arrows on the side of the flex disc are "supposed" to point toward the flanges. From your install pics it appears they're all pointing away. Tell me I'm wrong, or that it doesn't matter. Bentley and all the DIYs I've seen on these say to align the arrows to point to the flanges... got to be a reason but I don't know why.

I don't know why they say the Arrows have to face the Trans Flange.
From a pure Physics standpoint, this is just a chunk of rubber with steel reinforcement, pretty much like a tire anatomy, and 6 symmetrical holes.
My guess is the direction of the arrow is not crucial.

I just realized the the O.P. Ebonix is from Australia the Down-Under, so they tend to do things opposite of Northern Hermisphere people. They drive on the left side of the road and they install the Giubo backward haha... sorry Ebonix I am just joking around, "a laugh a day keeps the doctor away" kind of thingy....